Puppeteer

Puppeteer Gumball was born into a puppeteering family, and was called the "giftless" child at an early age. Through countless failures, Puppeteer Gumball was finally able to grasp the ultimate puppeteering skill and became the greatest puppet manipulation master that ever lived!

Exclusive Skill

Born into a family of puppeteers, Puppeteer Gumball is not good with combat. However, he can make string puppets that possess various types of special abilities (upgrade skill to enhance effect), and put them in unimaginably useful roles on the battlefield.

When selected, enter the maze with 5 Curse scrolls.
Transcribes a new Curse scroll every floor.

Level 1: Inherits 80% of main gumball's HP
Level 2: Inherits 20% of main gumball's Attack
Level 3: Gains Protection feature (Casts Puppet Shield (weaker Ice Shield) at the beginning of each floor.)[notes 1]
Level 4: Gains Symbiosis feature (10% boost to gumball's Attack and Power while puppet is alive.)
Level 5: Gains Entwine feature: Every time an enemy is revealed by flipping a tile, 20% chance to Entwine it (Unable to take any action or and counterattack for 10 rounds)

Enhanced items

Notes

↑Puppet Shield is arguably the most important feature of Puppeteer's because entering every floor with even a modest damage-absorbing shield means than you can cruise through the first ~40-60 floors (except for bosses) and gain +1 Max HP on nearly every red potion.
The 10% Attack & Power bonus is cool, and the Entwine is basically 1 less enemy per floor, but the Puppet Shield is the part that is exploitable.